Re: [CAD_CAM_EDM_DRO] Imbedded computers

Stephen Wille Padnos wrote:

>The one thing that is different from most desktops is embedded video.
>Not just "video on the motherboard", but "video using shared memory
>access". This can be a problem for interrupt latency, and the CPU can't
>necessarily even tell that anything bad is happening - it gets
>effectively stopped while the video subsystem is using main memory
>
>

A question regarding systems that may exibit this problem. AGP uses
main memory to expand texture memory (to reduce the need to use more
expensive video memory and the requirement to move large textures across
the PCI bus into video memory). I believe all AGP video cards use
onboard video memory for mosts tasks, and the amount of main memory used
for textures is configurable. Does disabling AGP use of main memory for
textures correct the problem? Since motion control software is not
particularly noted for its intensive use of 3D texture mapping :),
disabling use of main memory for textures shouldn't present any problems.

Dave K